Portable oven



Nov. 6,1923. l 1,472,836

R. HOFFMAN PORTABLE OVEN Filed March .2e 1me 2 sheets-sheet 1 R HOFFMAN Nov. 6 1923.

PORTABLE OVEN Filed March 26 1920 2 Sheets-Sheec 2 Patented Nov. 6, 1923.

RUDOLPH HOFFMAN, OE HANKAREEQILLINOIS, ASSIGNORTO sEARs, ROEBUOK AND co., OE CHICAGO, iLLrNOIs, A CORPORATION or NEW YORK.

PORTABLE OVEN.

, Application led March 26,1920. SerialNo. 368,883.'

To all 'whom t concern:

Be it known that I, RUDOLPH HOFFMAN,

a citizen of the United States, residingat Kankakee, in the countyV of Kankakeeand State of Illinois, have invented certain new Y and useful Improvements in Portable Ovens, of which the following is a specification.A

The invention relates to ovens of thetype employed in conjunction with gas or oil heat-ing stoves, being adapted to be placed over the stove burnersupon the grate, and removed at will for storage in a convenient place.

ovens of the knoclrdown type, and'has for its aim the provision of an oven of extreme simplicity which is capable of being readily assembled by the ordinary consumer or purchaser, thus enabling the oven to be shipped in its disassembled form crated in a com` pact manner so as to consume -a minimum amount of space and avoid injury in shipment. Y

The object of theinvention thus generally stated, together with other and ancillary advantages, is attained by the construction Vand arrangement illustrated in the accompanying drawings forming part hereof, in which Figure 1 is a front elevation of an Oven construct/ed in accordance with my invention. Fig. 2 is a fragmentary horizontal sectional f view taken on an enlarged scale substantially on the line 2 2 'of F 1. Fig. 3 is a fragmentary vertical sectionalview taken on line 3 3 of Fig. 2. Fig. a is a fragmentary sectional view taken inthe planeof line 4 4 of Fig. 3 and showing on an enlarged scale kdetails of construction. is alperspective view of an upper corner of the oven with parts broken away to show details of construction. Fig. @is a perspective view of a portion of the frame forming side plan view of one end of the top wall of the oven. `Fig,8 is an end elevation of one of the side walls of the oven. Fig. 9 isa fragmentary sectional view taken on line 9 9 oFig. 7. f .Y

VThe structure comprises generally a top fwall 1,. side walls 2, a rear end wall 3, and a front end wall L the latter wall having Fig. 5 l' a door `5 therein. 6 designates the open bottom wall or frame. shaped at Ytheir adjoining edges iso'as to interengage, being provided torthis purpose with`V interitting portions adaptedto be looked in operativeY relationship bymeans of lockingrods 7, of which there-are four The' several walls are' in number. Thegoven is assembled by `firstY v placing in position upon a table or the like, the top wall 1 and then associating with said wall tirst the side walls 2, which are-V arranged to interengagewith the wall 1 and be connected therewithby means of two of The invention relates more particularly to in position by means of a pair otithe rods Y.

7 the frame when'thus locked-in'position being adapted to'retain the several .walls in operative relation.V

Each of the walls with the exception of:V l

the bottom frame 6 is made double to provide an insulating air space. Thus the top wall 1 (Fig. 3) is Jformed byk'an outer sheet 8 and an inner sheet 9 spaced therefrom, Y and at the four edges of the wall the sheet 9 is bentV inwardly into engagement with the sheet 8 and clamped` in positionpthereon by a bent over flange 10 on each edgeof the sheet 8. Similarly, the end walls'2 are each formed by an outer sheet 8a andan inner slieet- 9a secured'at the four redges of the wall by a bent vover flange lOag'while the rearwall 3 (Fig. 2)is formed byan Outer Y sheetY Sb-and an Vinner sheet 9? secured at their edges bybent overfianges 10". The

front wall a consists of a plate'11 having bent over edges 12 for stilening. purposes and a central opening 4ta definedl by a flange 13, which opening is arranged to be closed V*by the door 5. The y'latter is hingedin a the bottom of the oven. Fig. 7 is an undersuitable manner as at 14 upon the plate 11 at the lower edge of the openingflfandsaid door is madel of 'double` wall construction Aas shownin Fig.-2 to provide aninsulating airl space. The door thusvc'omprlsesk anouterVV are constructedso asto interengage for the purpose of being locked together by the rods 7. rIhus the top wall is shaped to provide a channel 17 at each edge thereof which is formed by properly shaping `the inner sheet 9 and the inturned flange 10; and to lock these .walls in operative relation theinner sheets 9 and 9EL of: the rrespective walls are -apertured as at 18 and '18a to provide intervfitting loop portions 19 and 19i adapted to receive arod 7 so that the walls vare held .thereby lin operative relation. To permit of the insertion of the rod 7, the sheet 9 at the forward and rear corners vthereof is-aper- Q'turedLas at 20. (Figs. a and 5) ,and to serve Ias guides for the ends of the rods when inserted through such apertures, the sheet 9 is bent inwardlyY near the opposite'edges `thereof to form straps 21I (Figs. 7 and 9). .Said straps, it will be noted, are in `alinement with i the loop portions .1910i Athe .top wall.

With the side walls 2 secured in position withv reference tothe top wall 1, the rear wall 3 is next placed in operative relation to said walls. Said Wallhas its opposite edges made iat as sho-wn at 10b (Fig. 2), and to receive such edges the top wall 1 and end walls 2 have their flanges 10 andlOa respectively bent upwardly to form therebetween and the adjacent bentportions of the sheets 9 and 9achannels 17 and 17af(Figs. 2, 8 and 9). The rear wall thusengages at its top and side 'edges in the channels 17 and 17a of the end and top walls respectively. Similarly, the front .wall 4 has its side and top edges 12 engaging in channels 17 and 17a of the side and top walls. respectively.

The bottom wall or frame 6 (Figs. 3 and 6) is made Vfrom asingle sheet of material .having aAV raised central portion 22 provided with an` opening 23; and at the opposite edges of the (Wall are formed upright flanges 24e-which together with the raised portion 22 form a channel 25 at each edge of the frame toreceive the lower edges of the end walls 2, the rear wall 3-land `the front wall 4. Adj alcent the opposite side edges of said frame, the raised portion 22 Vis struck up to form looped portions 26, and isprovided with Aopenings 27 toreceive the loop portions 19a i (Fig. 3) at thelower'edgesof theside walls 2, the openingsllain the sheet 9a o f the end walls .being'adapted tofreceive said looped portions 26, and said 'intertting portions `-together 'forming elongated apertures for rei K' ceiving thefrods 7.

Inasse'mbling the oven, iftf willyb'eseen that the side walls 2 may irst be brought into operative association with the top wall 1 and locked by means of a pair of rods 7 en- Atered f. through the.- elongated apertures site end edges of thezframe, whereby to lock the parts together.V To lpermit of the insertion of the last mentioned rods 7, rtherear wall 3 is providedwith-apertures; 28 (Fig.

.4); and lto prevent the rods 7 fromaccidental.. removal said apertures arev preferably slightly offset as shown in said ligure.'` 1Preferabl also, the pair of aperturesV arewpro vide at the upper aswellas` thef'lower corners inthe rear wall in order thatthis wall may be used with eitherend up.

Suitable handles 29 may be provided upon theend walls 2, and. upon their inner sides the walls may be vprovided Awith thensual supports 30 for the oven shelves (not shown).

Itwill be seen that I haveprovided an oven of the knockdow-n type which lmay be cheaply constructedand which may be readily assembled by a purchaseroruser to whom it has been shipped in its knockdown form. Moreover, when set up, the. oven partsv are readily held together and cannot becomeaccidentally disassociated.

I claimas my invention:

1. A device ofthe-.character ,described comprising, incombination, top, bottonnside and end Walls having their adjacent edges shaped to v provide intertitting portions Wholly Within the oven forming elongated apertures, and means for interlockingsaid walls in' operative association comprising rods removably inserted in saidelongated apertures.

2. A device of the character described comprising, ink combination, '.top, bottom, side and end walls arranged to be operatively associated and secured together, into agrigid whole., certain ofsaiclwalls beingshap'ed to -edges of the vother walls, andv means .for locking said wallstogether. comprising a 'plurality of rods. said walls-.having atftheir adjoining edges interitting portionsA `forming elongated apertures Atoreceive saidrods.l

8. A'device of the character describedhaw jing hollow Wallscon'strueted from aninner and an outer sheet of metal spaced apart with their edges secured together'and.means vprovide ,channels ladapted te. receivethe bers bein having Walls constructed from two sheets of metal spaced apart to form insulating airl spaces but secured together at their edges,

said walls being shaped at certain edges to 'form channels adaptedto receive the edges? of adjoiningl walls, the inner sheets of the adjoining walls being constructed to provide in-terlitting strap portions forming elongated apertures, and locking devices adapted to be inserted into said apertures to secure the walls together. V

5. An oven comprising, in combination, adjoining Walls, each comprisin an outer wall member and an inner wal member spaced apart to provide an insulating air space, the inner wall members of the adjoin ing walls being adapted to interengage within the oven, and locking members arranged to coact with the interengaging wall members to hold them in operative association.

6. An oven comprising, in combination, adjoining walls, each comprising an outer wall member and an inner Wall member spaced apart to provide an insulating air space, the inner wall members Yof the adjoining walls being adapted to interengage, and locking pins arranged to coactwith the interengaging Wall members to hold them in operative association, the outer Wall memshaped to form with the inner Wall mem ers channels for receivingV the edges of the outer wall members of the adjoining walls.

oven comprising, in combination,

a top wall having channels formed upon its inner side at each side edge thereof, side and end walls having edges adapted to engage in said channels, a bottom Wall also having at its several edges and upon its inner side channels for receiving the edges of the side and end walls, the adjoining walls having portions adapted to coact to form elongated apertures, and locking pins entered in said apertures Vto secure their parts together into a rigid whole.

8.An oven of the class described havingk hollow walls comprising inner Vand outer sheets spaced apart to provide insulating air spaces, one of said Walls having a channel adapted to receive the edge of'th'e other wall and the inner sheets of both `of said ywalls having interengaging portions, and a tions uponrthe inner side andtop walls'iorm-Y ing elongated apertures, and locking Ypins adapted to-coactV with said portions; and means for securing the bottom Wallto said side'andiend-Walls, also comprising inter-V 'engaging portions upon the bottom and inner Iside Walls forming elongatedV apex tures, and locking pins adapted to coact with said portions.

l0. An oven-of the class described comprising, top, bottom, side and end Walls adaptedv to be secured together in operative relation, means for locking the Vside and end'walls to the top wall including interengaging portions uponthe side and top walls, and lockingpins adapted to coact with said portions;

and means for securing the bottom Wall tok said side and end Walls, also comprising interengaging portions upon the bottom and side wa1ls,and locking pins adapted to coactv with said portions, one of said'end Walls havingapertures therein for receiving said 'locking pins.

l1. An oven of the class described comprising, top, bottom, side and end walls adapted to be secured together in operative relation, means for locking the side and end walls to the top wall including interengaging portions upon the side and top Walls, and locking pins adapted to coact with said portions; and means for securing the bottom wall to said side and end Walls, also comprising interengaging portions upon the. bottom and side walls, and locking pins adapted to coact with said portions, oneV of said end walls having apertures therein Jfor receiving said locking pins and said apertures being oset with relation to said pins to prevent the accidental -displacement'of the pins. f

l2. An oven comprising, in combination,

hollow top, side and end Walls arranged to p be secured together in operative relation, and

a bottom wall inthe form of a sheet metalV apertures.

13. In a device of the class described, the

combination of two walls, one shaped atV Y- its edge to provide a channel adapted to receive the edge of the other wall, and secur- Y ing means comprising loops on the Yrespective portions adapted to register when the walls are assembled, and means` such. as a wire rod for insertion into the loops to lock the walls together. 1

14. In an ovenof the character described, comprising a bottom andV hollow top, side and end walls arranged to be secured together in` operative relation, interttingears on the inner walls of the sections, provided.

with apertures which when the sections are registering Y.vinterittecl form continuous elongated-eper-f t-ures,r locking. pins orlengajgementj insaidf apertures: to fasten the sections ytogether4 and tures being `offset relativelyv to -saidrst 'mentioned aperturesY `lwhereby to prevent:

accidental displacement of the-lookingfpins.

10 f k15. 1n adevice of the dass described, the

-olomlointion Lof twov l-fwaills aand, securing means forVthe-Wallsf comprising loops on the inner sides of-thewalls `errariged to register ini assembling thewalls, together with means adapted for insertion lintothe registering loops to" hold the .Walls together.

In testimony-"whereof, I Yhave hereunto setfrny hand. f

. RUDOLPH. Horn-MAN. 

